Taper gauge



May 26, 1953 B. A. WHITEMAN TAPER GAUGE 2 Sheets-Sheet 1 Filed June 13, 1949 n v Ml al wmmw INVENTOR. EJENTDN A -WHITEMAN y 1953 B. A. WHITEMAN 2,639,511

' TAPER GAUGE Filed June 13, 1949 2 s t -s t 2 INVENTOR. EJENTQN A .WHITEMAN w wif Patented May 26, 1953 UNITED STATES ATENT OFFICE TAPER GAUGE Be ton A.- Whit man, (Edenv Allen, Va.

Application J one 13, 1949, Serial No. 98,840

3 Claims. (01. 33174) My invention relates to a new and useful improvement in taper gauges and is designed to provide a precision tool for measuring tapers of work pieces. One familiar with the practice of machining tapered work pieces knows that very accurate measurement of the taper is necessary, that the piece be turned to the precise taper so that the piece may properly fit its socket. The lack of a tool for quickly and accurately making the necessary measurements prompted my invention. My improved tool meets this lack. The two forms of my tool measure exterior and interior tapers, respectively. The particularly novel and useful feature of both forms of my improved tool is the combination of three relatively adjustable parts whereby the amount of taper of the work piece can be measured, One of said parts provides a datum line and the other two are in constantly parallel planes normal to this line. By adjusting each of these parallel parts relative to the datum line, the taper of the Work piece, over a determined linear distance, viz. that between the parallel parts, can be determined. My tool is compact, easily made and readily used.

While I have illustrated in the drawings and have hereinafter fully described two specific embodiments of my invention, it is to be distinctly understood that I do not consider my invention to be limited to said specific embodiments but reference is made to the claims appended hereto to define the scope of my invention.

In the drawings:

Fig. 1 is an end elevation, partly in vertical section, of the form of my tool for measuring exterior tapers, applied to a work piec shown in side elevation.

Fig. 2 is a side elevation of the tool shown in Fig. 1.

Fig. 3 is a top plan of the tool.

Fig. 4 is a horizontal section on the line 4--4 of Fig. 2, in the direction of the arrows.

Fig. 5 is a side elevation. partly in vertical section, of the form of my tool for measuring interior tapers, applied to a work piece shown in vertical section.

Fig. 6 is a top plan of the tool shown in Fig. 5.

Fig. 7 is an end elevation of the tool.

Fig. 8 is a vertical section on the line 8-4; of Fig. 5, in the direction of the arrows.

As illustrated in Figs. 1 to 4, my improved tool for measuring exterior tapers, comprises an anvil having a top plane face l-a and a depending lug 1-?) (Fig. 2) in which is pinned or otherwise suitably fixed the end of an arm 2 which has adjacent its other end a socket 2-a (Fig. 4) in which 2 is fixedly seated a post 3 having a longitudinal Slot 3a (Fig. 2) in which is slidable a set. screw 4 threaded into an arm 5 and having a knurled head l-tt bearing on the post 3 which is received in a slot B-a (Fig. 3) in the arm 5. On the outer end of the arm 5, there is fixed a bracket 5.

It will be noted (Figs. 1 and 2) that the parts i to 6 are so related that while the arms 2 and 5 are relatively adjustable, by sliding arm 5 along post 3, the arms 2 and 5 both being normal to the post 3 are constantly parallel, and that the anvil l and bracket 5 are constantly aligned Vertically.

A spindle I (Fig. 1) is mounted in the bracket its middle portion iv-a fitting in a bore 5-a in the bracket 6, its collar Lb engagin the lower face of the bracket 5 and its upper portion l-c having threaded thereon a knurled lock-nut Ld bearing on the upper face of the bracket 8. The lower portion l.-e of the spindle 1 depends from the bracket (5 toward the anvil l, and its bottom plane face l-f (Fig. 2) is constantly parallel with the top plane face l-a of the anvil I.

A micrometer 8 of common form is mounted in the bracket 5 (Fig. 1), its bushing tl-a fitting in a bore 5-1) of the bracket 6 and being clamped therein by a lock bolt li-c threaded in the bracket (3. A tube 3-42 projecting from the bushing il-a is provided with the usual micrometer scale and has threaded therein the micrometer measuring stem 3-0 with an indicating sleeve 6-41 oo-acting with the scale. The lower portion 8-e of the measuring stem 8-c depends from the bracket 5 toward the anvil I, and its bottom plane face 3--) Fig. l) is constantly parallel with the faces l-a of the anvil l and 1-) of the spindle 1'.

It will be noted (Fig. 1) that the portions Lo and S c of the spindle l and the micrometer 8, respectively, are of identical diameter, that the longitudinal axes of the spindle i and the micrometer S are normal to the parallel longitudinal axes of the anvil l and the bracket 6, and that (Fig. 3) the longitudinal axes of the spindle i and the micrometer 8 lie in a common vertical plane passing through the longitudinal axes of the anvil I and the bracket 6.

As illustrated in Figs. 5 to 8, my improved tool for measuring interior tapers comprises a base plate I01 having a bottom rectilinear edge tilt-a. and provided with a projecting post [OI-b normal to the plate lill and on which is slidably mounted a bar H32 having a set-screw IOZ-a for fixing the bar I92 in adjusted relation to the plate till. A spindle I03 is threaded in the bar I02 and is provided with a lock-nut 1113-11 for fixing the spindle I03 in adjusted relation to the bar I02, and is so fabricated that its conical upper end terminates in an apex I 03-12. A micrometer I04 is mounted in the bar I02, its shank I04-a being threaded therein and its collar I04-b engaging the upper face of the bar I 02. The measuring stem [04-0 of the micrometer I04 is threaded on the shank 104-11 and has the usual micrometer scale, a knurled collar I04-d and its conical upper end terminates in an apex I04-e.

It will be noted (Fig. 5) that the longitudinal axes of the spindle I03 and the micrometer I04 are parallel and normal to the longitudinal axis of the plate WI, and, (Fig. 7) that the apices I03-b and I04-e lie in a common vertical plane passing through the edge IOI-a of the plate IOI.

The bar I 02 has a rod I 05 extending co-axially thereof with a knurled handle I06 on its outer end.

From the foregoing description of the details of construction of my improved tool, its operation for measuring tapers will be obvious. The form of the tool for measuring exterior tapers of work pieces (Figs. 1 to 4) operates as follows. When the plane face I-a of the anvil I and the tapered face of the work piece P have been brought into contact (Fig. 1), the arm 5 is adjusted on the post 3 to bring the plane face 'I- of the spindle I into contact with the tapered face of the work piece P and the arm 5 is fixed on the post 3 by the set-screw 4. The micrometer 8 is then adjusted to bring its plane face 8- into contact with the tapered face of the work piece P. The reading given by the micrometer 8 indicates the measure of the taper of the exterior face of the work piece P in the known distance, for instance one inch, between the axes of the spindle I and the measuring stem 8-0 of the micrometer 8. The taper per inch is readily converted to degrees by reference to a taper and corresponding angle table, such tables being available in any machinists hand book. The form of the tool for measuring interior tapers of work pieces (Figs. 5 to 8) operates as follows. The purpose of the threads on the spindle I 03 is for properly relating the spindle I03 to the micrometer I04. The spindle I03 does not have to be adjusted in the bar I02 every time the tool is used. When the micrometer I04 is set at zero, the spindle I03 is so adjusted in the bar I02 that the distance from the apex I03-b to the edge IOI-a and the distance from the apex I04-e to the edge IUI-a are identical. The tool is thus properly adjusted for measuring tapers. The adjustment should last for a considerable period of use. When the inside taper is to be measured, the plate [DI and the bar I02 are so adjusted that the edge IOI-a and the apex I03-b are in contact with the interior tapered face of the work piece P. The micrometer I04 is then adjusted to bring the apex I04-e of its measuring stem I04-c into contact with the interior tapered face of the work piece P. The reading given by the micrometer I04 indicates the measure of the taper of the interior face of the work piece P in the known distance 4 between the axes of the spindle I03 and the micrometer I04. This taper measurement can be converted, as above explained.

When I designed by improved tool for measuring interior tapers, I conceived the idea of making the tool with a plurality of interchangeable base plates IN. The tool, with about three or four interchangeable base plates, would take care of a wide range of measurements of work pieces. Such interchangeable plates would be identical except that the posts IOI-b would be consecutively longer.

Having described my invention, what I claim is:

1. In a taper gauge, the combination of a base having a rectilinear edge; a post mounted on said base; a bar slidably mounted on said post for adjustment relative said base; a spindle threaded in said bar for adjustment relative said bar; and a micrometer mounted on said bar and having a measuring stern adjustable relative to said bar, the longitudinal axes of said spindle and said stem being parallel, normal to said edge, and relatively spaced a fixed distance, said spindle and said stem having outer ends, respectively, extending away from said edge.

2. In a tool for measuring internal tapers, the combination of a bar; a base adjustable on said bar and having a rectilinear edge; a spindle adjustable on said bar; and a micrometer having a stem adjustable on said bar, said base being disposed on one side of said bar and said spindle and said stem being disposed on the other side of said bar and having outer ends, respectively, extending away from said edge.

3. In a tool for measuring internal tapers, the combination of a base having a rectilinear edge; a post mounted in said base normal to said edge; a bar having a transverse bore in which said post is loosely received; a set-screw in said bar co-acting with said post for fixing said bar in adjusted relation with said base; a spindle threaded in said bar for adjustment relative said bar; and a micrometer having a shank threaded in said bar and a measuring stem threaded on said shank, said spindle and said stem having conical outer ends, respectively, extending away from said edge and having their apices lying in a common plane passing through said edge.

BENTON A. WHITEMAN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 456,875 Bellows July 28, 1891 1,389,381 Renton Aug. 30, 1921 1,398,296 Goguen et al Nov. 29, 1921 2,016,420 Engst Oct. 8, 1935 2,314,480 Clark Mar. 23, 1943 FOREIGN PATENTS Number Country Date 359,535 Germany Sept. 23, 1922 360,544 Germany Sept. 28, 1922 608,171 England Sept. 10, 1948 

